NO168985B - DEVICE AT CHAIR. - Google Patents
DEVICE AT CHAIR. Download PDFInfo
- Publication number
- NO168985B NO168985B NO874362A NO874362A NO168985B NO 168985 B NO168985 B NO 168985B NO 874362 A NO874362 A NO 874362A NO 874362 A NO874362 A NO 874362A NO 168985 B NO168985 B NO 168985B
- Authority
- NO
- Norway
- Prior art keywords
- hydrazine
- water
- weight
- soluble
- additive
- Prior art date
Links
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 5
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000012190 activator Substances 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 150000003841 chloride salts Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 2
- 229960000907 methylthioninium chloride Drugs 0.000 description 2
- WOAHJDHKFWSLKE-UHFFFAOYSA-N 1,2-benzoquinone Chemical compound O=C1C=CC=CC1=O WOAHJDHKFWSLKE-UHFFFAOYSA-N 0.000 description 1
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229930192627 Naphthoquinone Natural products 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- -1 naphthaquinone-(1 Chemical class 0.000 description 1
- 150000002791 naphthoquinones Chemical class 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 150000004053 quinones Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
Landscapes
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Finger-Pressure Massage (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs Characterized By Structure (AREA)
Description
Fremgangsmåte til korrosjonsbeskyttelse ved hjelp av et hydrazin-preparat. Method for corrosion protection using a hydrazine preparation.
Oppfinnelsen vedrører beskyttelse av metalliske over-flater i lukkede kar og rørsystemer med vandig innhold mot korrosjon. The invention relates to the protection of metallic surfaces in closed vessels and pipe systems with aqueous content against corrosion.
Det er kjent å bekjempe korrosjon i tekniske innretninger som dampkjeler, fjernoppvarmingsanlegg, varmtvannsoppvarmingssystemer ved at man til det heri befinnende vann setter hydrazin. Virkningen av denne tilsetning forklarer man spesielt med en binding av det i vann oppløste oksygen. Dessuten lar iakttagelser det anta at hydrazinet på jernoverflaten begunstiger dannelsen av et tett og fastklebende beskyt-telsessjikt av magnetitt. It is known to combat corrosion in technical devices such as steam boilers, district heating systems, hot water heating systems by adding hydrazine to the water contained therein. The effect of this addition is explained in particular by a binding of the oxygen dissolved in water. Moreover, observations suggest that the hydrazine on the iron surface favors the formation of a dense and adhesive protective layer of magnetite.
Da hydrazinets reaksjonshastighet med oksygen ved værelsetemperatur imidlertid bare er liten, blir korrosjonsbeskyttelsesvlrk-ningen, spesielt på blanke metallflater uten Fe^O^-sjikt utilfreds-stillende under 60°C, selv når det i vannet er oppløst klorider og sulfater. Man har derfor allerede foreslått aktivatortilsetninger, However, since the hydrazine's reaction rate with oxygen at room temperature is only small, the corrosion protection performance, especially on shiny metal surfaces without an Fe^O^ layer, becomes unsatisfactory below 60°C, even when chlorides and sulfates are dissolved in the water. Activator additions have therefore already been proposed,
som ved værelsetemperatur fører til en sterk akselerasjon av oksygen-bindingen. Hertil har i den senere tid en synergistisk virksom kombinasjon av metylenblått og ^Cu(CN J^^K^ vist seg fremragende, selv på blankt metall i sterkt saltholdige oppløsninger, imidlertid bare begrenset til spesialtilfellene ved våtkonservering av stillestående eller lukkede vannføringssystemer og lukkede kjølekretsløpsinnretninger. Det har vist seg at ovennevnte kombinasjon av følgende grunner ikke which at room temperature leads to a strong acceleration of the oxygen bond. In addition, in recent times a synergistically effective combination of methylene blue and ^Cu(CN J^^K^ has proven excellent, even on bare metal in highly saline solutions, however only limited to the special cases of wet preservation of stagnant or closed water flow systems and closed cooling circuit devices .It has been found that the above combination for the following reasons does not
er å anvende for anlegg som kontinuerlig drives ved høyere vanntempera-turer: j is to be used for installations that are continuously operated at higher water temperatures: j
Cyanidet er ikke stabilt, og det kan derfor utskille The cyanide is not stable and can therefore precipitate
seg elementært kobber, alt etter hydrazinoverskuddet under tiden allerede ved omtrent 40°C. I kraftverkdrift er imidlertid kobber uønsket av flere grunner; det tillatelige maksimalinnhold i høytrykkskjelens matningsvann utgjør 3 . 10~^ gram Cu pr. liter. Undertiden står det også lovmessige bestemmelser mot bruk av cyanforbindelser. itself elemental copper, depending on the hydrazine excess during the time already at about 40°C. In power plant operation, however, copper is undesirable for several reasons; the maximum permissible content in the high-pressure boiler's feed water amounts to 3 . 10~^ grams of Cu per litres. Sometimes there are also statutory provisions against the use of cyan compounds.
Metylenblått anvendes i form av dets hyarokloridj i mange tilfeller forstyrrer imidlertid en forurensning av vanndampkrets-løpet ved klorider. Videre består inntil halvparten av det på omtalte måte aktiverte handelsvanlige hydrazin-preparat av isopropanol for å Methylene blue is used in the form of its hyarochloridej in many cases, however, a contamination of the water vapor cycle by chlorides interferes. Furthermore, up to half of the commercially available hydrazine preparation activated in the manner mentioned consists of isopropanol in order to
, holde det på grunn av reduksjon ved hjelp av hydrazin dannede leukome-tylenblått i oppløsning. Derved økes ikke bare de økonomiske omkost-ninger, men det fremkommer også spesielle doseringsvanskeligheter ved den kontinuerlige tilblanding, fordi en vilkårlig fortynning med vann ikke er tillatelig på grunn av faren for utfnokning. , keeping it due to reduction by means of hydrazine formed leukome-tylene blue in solution. This not only increases the financial costs, but special dosing difficulties also arise with the continuous mixing, because an arbitrary dilution with water is not permissible due to the risk of dilution.
Som det nå er funnet, bortfaller de forannevnte ulemper og anvendelsesbegrensninger ved en fremgangsmåte til korrosjonsbeskyttelse av jernmetall i kar med vandig innhold under anvendelse av hydrazin og et tilsetningsmiddel, som aktiverer dette, idet fremgangsmåten er karakterisert ved at man som aktiverende tilsetningsmiddel anvender en av de kjente vannoppløselige o- eller p-kinoide forbindelser i et vektsforhold til NgH^ mellom 1 ; I5OO og 1 : 15, fortrinnsvis mellom 1 : 150 og 1 : 3°- Videre vedrører oppfinnelsen en blanding til gjennomføring av fremgangsmåten, idet blandingen er karakterisert ved at den består av en oppløsning av 24 vektprosent hydrazinhydrat og 0,01 til 1 vektprosent av en deri oppløselig o- eller p-kinoid forbindelse i vann. As it has now been found, the above-mentioned disadvantages and limitations of use in a method for corrosion protection of ferrous metal in vessels with aqueous content using hydrazine and an additive which activates this are eliminated, the method being characterized by using as an activating additive one of the known water-soluble o- or p-quinoid compounds in a weight ratio to NgH^ between 1 ; 1500 and 1:15, preferably between 1:150 and 1:3°- Furthermore, the invention relates to a mixture for carrying out the method, the mixture being characterized in that it consists of a solution of 24% by weight hydrazine hydrate and 0.01 to 1% by weight of a therein soluble o- or p-quinoid compound in water.
Eksempler på slike forbindelser er o- og p-kinon, nafto-kinonene, antrakinonene og derivatene, spesielt slike med hydrofile substituenter, spesielt karbonsyrer og sulfonsyrer, såvel som deres alkalisalter, som naftakinon-(l ,2 )-sulfonsyre-(4-)-kalium, antrakinon-(9,10)-sulfonsyre-(2)-natrium, 1-nitroantrakinon-(9,10)-karbonsyre-(2). Det lønner seg å tilblande disse forbindelser til hydrazin—hydrat-oppløsningen i hydroksylform, altså som pyrokatekin, hydrokinon osv., spesielt ved fremstillingen av et handelsvanlig preparat med eksempelvis 24 vektprosent hydrazinhydrat (=■ 15% NgH^), for å unngå en reaksjon av kinoner med hydrazin under oppvarming, gassutvikling og forbruk av en del av hydrazinet. Examples of such compounds are o- and p-quinone, the naphthoquinones, the anthraquinones and their derivatives, especially those with hydrophilic substituents, especially carboxylic acids and sulfonic acids, as well as their alkali salts, such as naphthaquinone-(1,2)-sulfonic acid-(4- )-potassium, anthraquinone-(9,10)-sulfonic acid-(2)-sodium, 1-nitroanthraquinone-(9,10)-carbonic acid-(2). It pays to add these compounds to the hydrazine-hydrate solution in hydroxyl form, i.e. as pyrocatechin, hydroquinone, etc., especially when preparing a commercially available preparation with, for example, 24% by weight hydrazine hydrate (=■ 15% NgH^), to avoid a reaction of quinones with hydrazine during heating, gas evolution and consumption of part of the hydrazine.
Det er å anta at de ifølge oppfinnelsen som aktivatorer anvendte kinoide forbindelser virker som ekte katalysatorer, som hur-tigere enn hydrazinet umiddelbart reagerer, opptar hydrazinets hydrogen og overfører til det i vann oppløste oksygen. It is assumed that the quinoid compounds used as activators according to the invention act as real catalysts, which immediately react faster than the hydrazine, take up the hydrazine's hydrogen and transfer it to the water-dissolved oxygen.
På diagrammet er det vist den aktiverende virkning på fire eksempler. De dertil anvendte preparater inneholdt 3 gram av hver av de angitte aktivatorer i en liter av en 24 vektprosent hydrazin-hydratholdig vandig oppløsning og ble fortynnet med oksygenovermettet kondensvann til et innhold på 0,15 gram NgH^/liter; pH = 9»5; temperatur °» 20°C. Kurvene viser det fra begynnende 35 mg/liter avtagende oksygen-innhold av prøvene i avhengighet av iakttagelsestiden. The diagram shows the activating effect on four examples. The preparations used for this purpose contained 3 grams of each of the specified activators in one liter of a 24% by weight hydrazine hydrate-containing aqueous solution and were diluted with oxygen-supersaturated condensed water to a content of 0.15 grams of NgH^/liter; pH = 9-5; temperature °» 20°C. The curves show the decreasing oxygen content of the samples starting at 35 mg/litre depending on the observation time.
Claims (2)
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO874362A NO168985C (en) | 1987-10-19 | 1987-10-19 | DEVICE AT CHAIR. |
PCT/NO1988/000079 WO1989003648A1 (en) | 1987-10-19 | 1988-10-14 | Arrangement in an adjustable chair |
JP63508183A JPH01503524A (en) | 1987-10-19 | 1988-10-14 | Placement in chair |
EP88908998A EP0338050B1 (en) | 1987-10-19 | 1988-10-14 | Arrangement in an adjustable chair |
AU25456/88A AU606477B2 (en) | 1987-10-19 | 1988-10-14 | Arrangement in an adjustable chair |
AT88908998T ATE103783T1 (en) | 1987-10-19 | 1988-10-14 | ARRANGEMENT FOR AN ADJUSTABLE ARMCHAIR. |
US07/372,381 US4984846A (en) | 1987-10-19 | 1988-10-14 | Arrangement in an adjustable chair |
GB8913726A GB2230943B (en) | 1987-10-19 | 1988-10-14 | Arrangement in an adjustable chair |
DE3888962T DE3888962T2 (en) | 1987-10-19 | 1988-10-14 | ARRANGEMENT FOR AN ADJUSTABLE ARMCHAIR. |
CA000580416A CA1299990C (en) | 1987-10-19 | 1988-10-18 | Arrangement in a chair |
DK198902936A DK172902B1 (en) | 1987-10-19 | 1989-06-14 | Interior of an adjustable chair |
FI892978A FI87884C (en) | 1987-10-19 | 1989-06-16 | Arrangement in an adjustable chair |
HK105892A HK105892A (en) | 1987-10-19 | 1992-12-31 | Arrangement in an adjustable chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO874362A NO168985C (en) | 1987-10-19 | 1987-10-19 | DEVICE AT CHAIR. |
Publications (4)
Publication Number | Publication Date |
---|---|
NO874362D0 NO874362D0 (en) | 1987-10-19 |
NO874362L NO874362L (en) | 1989-04-20 |
NO168985B true NO168985B (en) | 1992-01-20 |
NO168985C NO168985C (en) | 1992-04-29 |
Family
ID=19890321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO874362A NO168985C (en) | 1987-10-19 | 1987-10-19 | DEVICE AT CHAIR. |
Country Status (11)
Country | Link |
---|---|
US (1) | US4984846A (en) |
EP (1) | EP0338050B1 (en) |
JP (1) | JPH01503524A (en) |
AU (1) | AU606477B2 (en) |
CA (1) | CA1299990C (en) |
DE (1) | DE3888962T2 (en) |
DK (1) | DK172902B1 (en) |
FI (1) | FI87884C (en) |
GB (1) | GB2230943B (en) |
NO (1) | NO168985C (en) |
WO (1) | WO1989003648A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994022348A1 (en) * | 1993-03-26 | 1994-10-13 | Oy Ortus Ab | Frame structure of a foldable chair |
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US5106157A (en) * | 1989-03-01 | 1992-04-21 | Herman Miller, Inc. | Chair height and tilt adjustment mechanisms |
AU3647393A (en) * | 1992-03-10 | 1993-10-05 | Ashfield Engineering Company (Wexford) Limited | A chair tilting mechanism |
GB2271053A (en) * | 1992-09-30 | 1994-04-06 | Edward L Stulik | Reclining chair |
US5577807A (en) | 1994-06-09 | 1996-11-26 | Steelcase Inc. | Adjustable chair actuator |
US5765914A (en) | 1995-06-07 | 1998-06-16 | Herman Miller, Inc. | Chair with a tilt control mechanism |
US5871258A (en) * | 1997-10-24 | 1999-02-16 | Steelcase Inc. | Chair with novel seat construction |
USD463144S1 (en) | 2000-09-28 | 2002-09-24 | Formway Furniture Limited | Chair |
AU783829B2 (en) | 2000-09-28 | 2005-12-08 | Formway Furniture Limited | A reclinable chair |
AUPR054400A0 (en) | 2000-09-29 | 2000-10-26 | Formway Furniture Limited | A castor |
DE10109624C1 (en) * | 2001-02-28 | 2002-09-12 | Interstuhl Bueromoebel Gmbh | Chair, especially office chair |
US6827401B2 (en) | 2001-10-17 | 2004-12-07 | La-Z-Boy Incorporated | Leaf spring rocker mechanism for a reclining chair |
US6869142B2 (en) | 2002-09-12 | 2005-03-22 | Steelcase Development Corporation | Seating unit having motion control |
US6880886B2 (en) * | 2002-09-12 | 2005-04-19 | Steelcase Development Corporation | Combined tension and back stop function for seating unit |
DE10306851A1 (en) * | 2003-02-18 | 2004-08-26 | Dózsa-Farkas, Andras | Office chair has back rest which reclines about axis at ends of L-shaped levers mounted on its base, seat sliding forward in synchronization with back rest and axis maintaining constant position above seat |
US7048335B2 (en) * | 2003-06-05 | 2006-05-23 | Steelcase Development Corporation | Seating unit with crossbar seat support |
US7207629B2 (en) * | 2003-06-23 | 2007-04-24 | Herman Miller, Inc. | Tilt chair |
US6942080B2 (en) * | 2003-12-04 | 2005-09-13 | Tsann Kuen Enterprise Co., Ltd. | Electrical appliance having a wire winding device |
US7273253B2 (en) * | 2004-06-09 | 2007-09-25 | Kimball International, Inc. | Chair ride mechanism with tension assembly |
US7237841B2 (en) * | 2004-06-10 | 2007-07-03 | Steelcase Development Corporation | Back construction with flexible lumbar |
US7458637B2 (en) * | 2004-06-10 | 2008-12-02 | Steelcase Inc. | Back construction with flexible lumbar |
GB0517384D0 (en) * | 2005-08-26 | 2005-10-05 | Birkbeck Hilary R | Variable configuration seating |
US7569002B2 (en) * | 2005-11-14 | 2009-08-04 | Avinoam Nativ | Exercise wheelchair |
US7922248B2 (en) | 2007-01-29 | 2011-04-12 | Herman Miller, Inc. | Seating structure and methods for the use thereof |
US8567864B2 (en) | 2011-08-12 | 2013-10-29 | Hni Corporation | Flexible back support member with integrated recline stop notches |
JP2014530056A (en) | 2011-09-21 | 2014-11-17 | ハーマン、ミラー、インコーポレイテッドHerman Miller Incorporated | Two-stage headrest, body support structure, and method for supporting user skull |
US9198514B2 (en) | 2012-05-23 | 2015-12-01 | Hni Technologies Inc. | Chair with pivot function and method of making |
USD707995S1 (en) | 2012-05-23 | 2014-07-01 | Hni Technologies Inc. | Chair |
US8820835B2 (en) | 2012-08-29 | 2014-09-02 | Hni Technologies Inc. | Resilient chair incorporating multiple flex zones |
PL3206535T3 (en) | 2014-10-17 | 2020-11-16 | Ekornes Asa | Balance joint |
US11259637B2 (en) | 2015-04-13 | 2022-03-01 | Steelcase Inc. | Seating arrangement |
US10194750B2 (en) | 2015-04-13 | 2019-02-05 | Steelcase Inc. | Seating arrangement |
CN107708491B (en) | 2015-04-13 | 2022-02-22 | 斯迪尔科斯公司 | Seating arrangement |
US9713381B2 (en) | 2015-06-11 | 2017-07-25 | Davis Furniture Industries, Inc. | Chair |
USD834846S1 (en) * | 2015-09-30 | 2018-12-04 | himolla Polstermöbel GmbH | Sofa |
WO2019032971A1 (en) | 2017-08-10 | 2019-02-14 | Hni Corporation | Chairs including flexible frames |
CN113507865A (en) | 2019-02-21 | 2021-10-15 | 斯特尔凯斯公司 | Body support assembly and methods for use and assembly thereof |
US11166553B2 (en) * | 2019-06-05 | 2021-11-09 | Davis Furniture Industries, Inc. | Tilting chair |
US11357329B2 (en) | 2019-12-13 | 2022-06-14 | Steelcase Inc. | Body support assembly and methods for the use and assembly thereof |
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US2522246A (en) * | 1945-08-28 | 1950-09-12 | Percy L Porter | Reclining chair |
FR1449822A (en) * | 1965-07-05 | 1966-05-06 | Reclining adjustable relaxation seat | |
NO125836B (en) * | 1970-10-29 | 1972-11-13 | Ekornes Fabrikker As J E | |
DE2104944A1 (en) * | 1971-02-03 | 1972-08-17 | Pohl E | Infinitely adjustable tilting device with a constant center of gravity |
JPS5242707B2 (en) * | 1972-08-29 | 1977-10-26 | ||
JPS4995756A (en) * | 1972-11-30 | 1974-09-11 | ||
BE799878A (en) * | 1973-01-24 | 1973-09-17 | Lusch Ferdinand | ADJUSTABLE LONG CHAIR |
DE8025516U1 (en) * | 1980-09-24 | 1981-01-15 | Zapf, Otto, 6240 Koenigstein | SEAT FURNITURE |
IT1151580B (en) * | 1982-06-04 | 1986-12-24 | Emu Spa | MUTUAL TILT ADJUSTMENT DEVICE BETWEEN THE BACK AND THE SEAT OF AN ARMCHAIR, LAYER OR SIMILAR |
US4504090A (en) * | 1982-10-20 | 1985-03-12 | Goldman Paul R | Swivel, tilt and recline arm chair |
JPS6067235A (en) * | 1983-09-22 | 1985-04-17 | Ikeda Bussan Co Ltd | Swing seat |
US4660884A (en) * | 1985-01-30 | 1987-04-28 | Ikeda Bussan Co., Ltd. | Reclining chair |
US4607883A (en) * | 1985-08-23 | 1986-08-26 | Tzu Chun Huang Y | Reclining mechanism for easy chair |
FI72865C (en) * | 1985-11-22 | 1987-08-10 | Jorma Saarainen | Device for control and locking of seat backrest. |
-
1987
- 1987-10-19 NO NO874362A patent/NO168985C/en not_active IP Right Cessation
-
1988
- 1988-10-14 JP JP63508183A patent/JPH01503524A/en active Granted
- 1988-10-14 WO PCT/NO1988/000079 patent/WO1989003648A1/en active IP Right Grant
- 1988-10-14 GB GB8913726A patent/GB2230943B/en not_active Expired - Lifetime
- 1988-10-14 US US07/372,381 patent/US4984846A/en not_active Expired - Lifetime
- 1988-10-14 DE DE3888962T patent/DE3888962T2/en not_active Expired - Lifetime
- 1988-10-14 EP EP88908998A patent/EP0338050B1/en not_active Expired - Lifetime
- 1988-10-14 AU AU25456/88A patent/AU606477B2/en not_active Expired
- 1988-10-18 CA CA000580416A patent/CA1299990C/en not_active Expired - Lifetime
-
1989
- 1989-06-14 DK DK198902936A patent/DK172902B1/en not_active IP Right Cessation
- 1989-06-16 FI FI892978A patent/FI87884C/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994022348A1 (en) * | 1993-03-26 | 1994-10-13 | Oy Ortus Ab | Frame structure of a foldable chair |
Also Published As
Publication number | Publication date |
---|---|
NO874362D0 (en) | 1987-10-19 |
GB2230943A (en) | 1990-11-07 |
DE3888962D1 (en) | 1994-05-11 |
JPH057007B2 (en) | 1993-01-27 |
EP0338050B1 (en) | 1994-04-06 |
WO1989003648A1 (en) | 1989-05-05 |
EP0338050A1 (en) | 1989-10-25 |
GB2230943B (en) | 1992-04-08 |
AU606477B2 (en) | 1991-02-07 |
FI87884C (en) | 1993-03-10 |
CA1299990C (en) | 1992-05-05 |
FI87884B (en) | 1992-11-30 |
DK293689A (en) | 1989-06-14 |
JPH01503524A (en) | 1989-11-30 |
FI892978A (en) | 1989-06-16 |
US4984846A (en) | 1991-01-15 |
DK172902B1 (en) | 1999-09-27 |
DK293689D0 (en) | 1989-06-14 |
DE3888962T2 (en) | 1994-07-21 |
FI892978A0 (en) | 1989-06-16 |
NO168985C (en) | 1992-04-29 |
AU2545688A (en) | 1989-05-23 |
GB8913726D0 (en) | 1990-07-18 |
NO874362L (en) | 1989-04-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK1K | Patent expired |